LumberJocks

Chair repair/reglue - Need help identifying the old glue

  • Advertise with us

« back to Joinery forum

Forum topic by SilverbackReef posted 01-15-2015 02:45 PM 789 views 0 times favorited 12 replies Add to Favorites Watch
View SilverbackReef's profile

SilverbackReef

20 posts in 2417 days


01-15-2015 02:45 PM

Topic tags/keywords: question joining

Have some chairs that are about 15 years old that started getting loose/wobbly. The missus got on me to fix them. I’m thinking “crap, probably doweled…this is gonna be a PITA”. I was wrong.

The chairs are actually made pretty well. Good design and well made parts with all M&T joinery. The only problem was at the glue stage. They just plopped a little glue in the bottom of the mortise and shoved the tenon in. No good glue spread on the long grain surfaces.

Given what I learned from the initial loose joints, it’s clear that I need to open and reglue almost all of them which means disassembling non-loose joints. So far I’ve disassembled three joints: first one with hot water, second and third by wrapping with a heating pad for about 30 minutes.

The old glue is dark brown and when the warm joint opens it’s a littlle bit gummy. Given that heat is enough to loosen it, the dark brown color, and the warm-gummy consistency; can I assume this is hide glue?

I’ve never used hide glue (it’s on my list of things to learn this year) so I have no experience to tell for myself.

If it is hide glue, based on my reading, it may save me some work in cleaning off the old glue because the fresh glue will soften and mix with it.

Thanks for any thoughts.
-Mark


12 replies so far

View mahdee's profile

mahdee

3553 posts in 1232 days


#1 posted 01-15-2015 03:05 PM

I think your assumption is correct. Just sand/file the old glue off.

-- earthartandfoods.com

View dhazelton's profile

dhazelton

2325 posts in 1762 days


#2 posted 01-15-2015 03:12 PM

Why use hide glue, unless you just want to say that you did? I’d just pick up a bottle of Titebond and go with that. And a horse will thank you.

View gsurgeon's profile

gsurgeon

3 posts in 1565 days


#3 posted 01-15-2015 06:28 PM

Liquid hide glue is wonderful for gluing chairs because of the long open time. You’ve got to move pretty fast to glue one up with PVA glue.

View shipwright's profile

shipwright

7173 posts in 2263 days


#4 posted 01-15-2015 10:53 PM

It sounds like it is hide glue.
If so there is no need to do any old glue removal at all.
As for why you would use it …... because it’s better glue.
It is every bit as strong as PVA glues and it is reversible, requires less clamping, and on and on.
I encourage you to get into hide glue, you will likely never go back.

Check out this blog series for the lowdown.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fibreglass trees. http://thecanadianschooloffrenchmarquetry.com/

View lepelerin's profile

lepelerin

478 posts in 1790 days


#5 posted 01-16-2015 02:43 AM

Looks to me like hide glue. I love the long open time. I gave up on PVA glue for indoor projects.
I just restored 8 very old chairs, took me time however I am very happy with the result.
I use the old brown glue
http://www.oldbrownglue.com/. I got mine at leevalley

View bobro's profile

bobro

308 posts in 776 days


#6 posted 01-16-2015 06:18 AM



It sounds like it is hide glue.
If so there is no need to do any old glue removal at all.
As for why you would use it …... because it s better glue.
It is every bit as strong as PVA glues and it is reversible, requires less clamping, and on and on.
I encourage you to get into hide glue, you will likely never go back.

Check out this blog series for the lowdown.

- shipwright

+1

Restorators, conservators and my mom (deals antique and vintage stuff) will all thank you.

-- Lao Ma: You are so full of anger and hatred. Xena: Everybody's gotta be full of something.

View SilverbackReef's profile

SilverbackReef

20 posts in 2417 days


#7 posted 01-16-2015 12:06 PM

Thanks for weighing in folks.

Thanking my lucky stars that these chairs were assembled with hide glue and learned an important lesson.

Looks like I’m taking the hide-glue plunge sooner rather than later.

Just ordered a bottle of liquid OBG and adding a glue pot to the new-tool budget/queue.

View SCOTSMAN's profile

SCOTSMAN

5839 posts in 3050 days


#8 posted 01-16-2015 01:29 PM

Actually in real scientific terms glues have advanced tremendously over even the last decade.I would difintely use a more modern glue.The only thing I might use hide glue would be for marquetry veneer work.Read up before trying it and as said and also my understanding if using another type of glue from the original means the need to remove all the old stuff.Have fun Alistair

-- excuse my typing as I have a form of parkinsons disease

View SilverbackReef's profile

SilverbackReef

20 posts in 2417 days


#9 posted 01-26-2015 07:57 PM

Hi Folks, just a little update to wrap up this thread.

1) Got all the chairs dissassembled using heat and moisture. Two tenons broke but were easy to fix.

2) Confirmed it’s hide glue by mixing bits of it with some fresh. Completely dissolved.

3) For my own sake and the sake of future repairers decided to use “Old Brown Glue” liquid hide glue. Long open time and premixed. Heated in an old ‘appetizer’ size crock pot that sits nice and stable at 120F. Missus was happy to get another useless item out of the kitchen. (was probably gifted to us 25 years ago…and never used)

4) Using twisted rope for clamping. Back legs have a compound angle that would require a fiddly caul I don’t feel like making.

Since I’ve never built chairs…this was a really educational project. Thanks for all your input!

Attached a photo of the first one glued up and clamped.

View bobro's profile

bobro

308 posts in 776 days


#10 posted 01-26-2015 08:02 PM

Nice!

-- Lao Ma: You are so full of anger and hatred. Xena: Everybody's gotta be full of something.

View Dallas's profile

Dallas

3599 posts in 1952 days


#11 posted 01-26-2015 08:14 PM

Looking at all those ropes and knots, I just have to ask…. is there something you want to tell us that you keep personal? We won’t share on the interweb…... we promise!

-- Improvise.... Adapt...... Overcome!

View bobro's profile

bobro

308 posts in 776 days


#12 posted 01-26-2015 08:17 PM



Looking at all those ropes and knots, I just have to ask…. is there is something you want to tell us that you keep personal? We won t share on the interweb…... we promise!

- Dallas

Yeah, when they say “worse things happen at sea”, they might be referring to more colorful shenanigans than we’d assume!

-- Lao Ma: You are so full of anger and hatred. Xena: Everybody's gotta be full of something.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com